;
; RGB-to-Grayscale Color Conversion (32-bit SSE2)
;
; Copyright (C) 2011, 2016, 2024, D. R. Commander.
;
; Based on the x86 SIMD extension for IJG JPEG library
; Copyright (C) 1999-2006, MIYASAKA Masaru.
; For conditions of distribution and use, see copyright notice in jsimdext.inc
;
; This file should be assembled with NASM (Netwide Assembler) or Yasm.

%include "jsimdext.inc"

; --------------------------------------------------------------------------

%define SCALEBITS  16

F_0_114 equ  7471                ; FIX(0.11400)
F_0_250 equ 16384                ; FIX(0.25000)
F_0_299 equ 19595                ; FIX(0.29900)
F_0_587 equ 38470                ; FIX(0.58700)
F_0_337 equ (F_0_587 - F_0_250)  ; FIX(0.58700) - FIX(0.25000)

; --------------------------------------------------------------------------
    SECTION     SEG_CONST

    ALIGNZ      32
    GLOBAL_DATA(jconst_rgb_gray_convert_sse2)

EXTN(jconst_rgb_gray_convert_sse2):

PW_F0299_F0337 times 4 dw F_0_299, F_0_337
PW_F0114_F0250 times 4 dw F_0_114, F_0_250
PD_ONEHALF     times 4 dd (1 << (SCALEBITS - 1))

    ALIGNZ      32

; --------------------------------------------------------------------------
    SECTION     SEG_TEXT
    BITS        32

%include "jcgryext-sse2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED  EXT_RGB_RED
%define RGB_GREEN  EXT_RGB_GREEN
%define RGB_BLUE  EXT_RGB_BLUE
%define RGB_PIXELSIZE  EXT_RGB_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2  jsimd_extrgb_gray_convert_sse2
%include "jcgryext-sse2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED  EXT_RGBX_RED
%define RGB_GREEN  EXT_RGBX_GREEN
%define RGB_BLUE  EXT_RGBX_BLUE
%define RGB_PIXELSIZE  EXT_RGBX_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2  jsimd_extrgbx_gray_convert_sse2
%include "jcgryext-sse2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED  EXT_BGR_RED
%define RGB_GREEN  EXT_BGR_GREEN
%define RGB_BLUE  EXT_BGR_BLUE
%define RGB_PIXELSIZE  EXT_BGR_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2  jsimd_extbgr_gray_convert_sse2
%include "jcgryext-sse2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED  EXT_BGRX_RED
%define RGB_GREEN  EXT_BGRX_GREEN
%define RGB_BLUE  EXT_BGRX_BLUE
%define RGB_PIXELSIZE  EXT_BGRX_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2  jsimd_extbgrx_gray_convert_sse2
%include "jcgryext-sse2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED  EXT_XBGR_RED
%define RGB_GREEN  EXT_XBGR_GREEN
%define RGB_BLUE  EXT_XBGR_BLUE
%define RGB_PIXELSIZE  EXT_XBGR_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2  jsimd_extxbgr_gray_convert_sse2
%include "jcgryext-sse2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED  EXT_XRGB_RED
%define RGB_GREEN  EXT_XRGB_GREEN
%define RGB_BLUE  EXT_XRGB_BLUE
%define RGB_PIXELSIZE  EXT_XRGB_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2  jsimd_extxrgb_gray_convert_sse2
%include "jcgryext-sse2.asm"
